Zhou Mingde had anticipated this question and immediately answered, "Temple Master, your insight is clear. When that villain made a move against Zhengchun, upon seeing the third tier top-grade Defensive Talisman that Taoist Friend Mingxia had given him, he accidentally let slip and asked Zhengchun if the talisman was a reward he obtained from being an undercover spy in the Dragon Transformation Sect."
"Therefore, both Zhengchun and I believe it is very likely that he came for retaliation, certainly because Zhengchun had stood out too much at the Hundred Clans Conference and attracted too much attention. This must have led the spy that the Dragon Transformation Sect had planted to transmit the information back to them, thus the sect learned of Zhengchun's background!"
This speculation was both rational and entirely factual.
Master Qingwei had also long been aware that the Dragon Transformation Sect had Zhou Chun's name on their list.